For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningInstrument Panel Illumination Control
This feature controls the brightness of the instrument panel controls and infotainment
display screen. The thumbwheel is to the left of the steering column on the instrument
panel.
(Instrument Panel Brightness):
Move the thumbwheel up or down and hold, to brighten or dim the instrument pan ...
Customer Satisfaction Procedure
Your satisfaction and goodwill are important to your dealer and to Chevrolet.
Normally, any concerns with the sales transaction or the operation of the vehicle
will be resolved by your dealer's sales or service departments. Sometimes, however,
despite the best intentions of all concerned, ...
Collision Repair
Specifications
Point-to-point measurements are for reference only. All measurements are
given in millimeters. Use these measurements for diagnosing
and estimating. Point-to-point measurements are duplicated with tram bar
pointers set at equal lengths. All die marks, holes, slots, and
fast ...